有没有兄弟能够解答一下,c语言的问题

#include <stdio.h> 
#include <math.h>
int main()
{
    float r5, r3, r2, r1, r0, p, p1, p2, p3, p4, p5;
    p = 1000;
    r5 = 0.03;
    r3 = 0.0275;
    r2 = 0.021;
    r1 = 0.015;
    r0 = 0.0035;
    
    p1 = p*(1+r5*5);
    p2 = p*(1+2*r2)*(1+3*r3);
    p3 = p*(1+3*r3)*(1+2*r2);
    p4 = p*pow(1+r1,5);
    p5 = p*pow(1+r0/4,4*5);
    printf("p1=%f\n",p1);
    printf("p2=%f\n",p2);
    printf("p3=%f\n",p3);
    printf("p4=%f\n",p4);
    printf("p5=%f\n",p5);
    return 0; 
}

https://55.wendadaohang.com/c/712481391.html

为什么p2和p3值不一样,明明就是换了一下位置.